Adjustable Bouldering Wall Plans

I need detailed plans for a freestanding 12x9ft adjustable angle bouldering wall, using common dimensional lumber, signed off on by a structural engineer. The wall should be fully adjustable from 30° to 90°. It should incorporate bolt-on and screw-on holds.

Requirements:
- Detailed construction plans
- Use of common dimensional lumber
- Full angle adjustability (30° to 90°)
- Design to accommodate bolt-on and screw-on holds

Ideal Skills & Experience:
- Licensed structural engineer with experience drafting structurally sound free standing structures with calculated live and dead loads.
- Knowledge of bouldering wall design is a plus
An example:
https://www.megalithclimbing.com/pages/freestanding-adjustable-system-wall